diff --git a/addons/account/static/src/js/reconciliation/reconciliation_model.js b/addons/account/static/src/js/reconciliation/reconciliation_model.js
index 48c668f33c8..b34fdd713a0 100644
--- a/addons/account/static/src/js/reconciliation/reconciliation_model.js
+++ b/addons/account/static/src/js/reconciliation/reconciliation_model.js
@@ -3,6 +3,8 @@ odoo.define('account.ReconciliationModel', function (require) {
 
 var BasicModel = require('web.BasicModel');
 var field_utils = require('web.field_utils');
+var utils = require('web.utils');
+var session = require('web.session');
 var CrashManager = require('web.CrashManager');
 var core = require('web.core');
 var _t = core._t;
@@ -579,7 +581,7 @@ var StatementModel = BasicModel.extend({
                 }));
             }
             ids.push(line.id);
-            values.push({
+            var values_dict = {
                 "partner_id": line.st_line.partner_id,
                 "counterpart_aml_dicts": _.map(_.filter(props, function (prop) {
                     return !isNaN(prop.id) && !prop.already_paid;
@@ -590,7 +592,23 @@ var StatementModel = BasicModel.extend({
                 "new_aml_dicts": _.map(_.filter(props, function (prop) {
                     return isNaN(prop.id);
                 }), self._formatToProcessReconciliation.bind(self, line)),
-            });
+            };
+            // If the lines are not fully balanced, create an unreconciled amount.
+            // line.st_line.currency_id is never false here because its equivalent to
+            // statement_line.currency_id or statement_line.journal_id.currency_id or statement_line.journal_id.company_id.currency_id (Python-side).
+            // see: get_statement_line_for_reconciliation_widget method in account/models/account_bank_statement.py for more details
+            var currency = session.get_currency(line.st_line.currency_id);
+            var balance = line.balance.amount;
+            if (!utils.float_is_zero(balance, currency.digits)) {
+                var unreconciled_amount_dict = {
+                    'account_id': line.st_line.open_balance_account_id,
+                    'credit': balance > 0 ? balance : 0,
+                    'debit': balance < 0 ? -balance : 0,
+                    'name': line.st_line.name + ' : ' + _t("Open balance"),
+                };
+                values_dict['new_aml_dicts'].push(unreconciled_amount_dict);
+            }
+            values.push(values_dict);
             line.reconciled = true;
             self.valuenow++;
         });